All releases of Drupal

Release Notes: Includes bugfixes and small API/feature improvements only (no major new functionality). Fixes a regression in 7.27 that broke JavaScript in some older Web browsers. Changes made to the Update Manager module in this release may lead to performance slowdowns in certain cases (including on rare page loads for site visitors, if the site is using the automated cron feature).

Release Notes: When pages are cached for anonymous users (either by Drupal or by an external system),
the form state may leak between anonymous users.
As a consequence, there is a chance that interim form input recorded for one anonymous user
(which may include sensitive or private information,
depending on the nature of the form) will
be disclosed to other users interacting with the same form at the same time.
This especially affects multi-step Ajax forms because the window of
opportunity (i.e.,
the time span between user input and final form submission) is indeterminable.
This release fixes this.

Release Notes: Multiple vulnerabilities were fixed related to optimistic cross-site request forgery
protection in the Form API validation,
multiple vulnerabilities due to weakness in
pseudorandom number generation using mt_rand() which affected the Form API,
OpenID and random password generation,
code execution prevention using the files directory .htaccess for Apache,
access bypassing for security token validation,
cross-site scripting in the image and color modules,
and an open redirect in the overlay module.

Release Notes: Resolves a vulnerability that allows blocked users to appear in user search results, even when the search results are viewed by unprivileged users. An arbitrary PHP code execution vulnerability was also fixed in the file upload module.

Release Notes: This is a maintenance release. It includes bugfixes and small API/feature improvements only (no major new functionality); significant new features are only being added to the forthcoming Drupal 8.0 release. No security fixes are included in this release. Besides documentation fixes, no changes have been made to the .htaccess, robots.txt, or settings.php files in this release, so upgrading custom versions of those files is not necessary.